*{
 *  create a javascript element to make a jQuery datepicker on a input field
 *  id (required) the ID of the html input field
 *  lang (optional) the lang to use for the datepicker (default: en-GB)
}*
<script type="text/javascript">
    $(document).ready(function() {
        $("#${_id}").datepicker($.datepicker.regional['${_lang ? _lang :'en-GB'}']);
    });
</script>
